Results 141 to 150 of about 2,155,828 (298)

An overview of the petrography and petrology of particles from aggregate sample from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract The OSIRIS‐REx mission returned a sample of regolith from the carbonaceous asteroid Bennu in September 2023. We present preliminary in situ investigations of the petrology and petrography of selected particles ranging in size from 0.5 to 3 mm.
Harold C. Connolly Jr, Dante S. Lauretta, Timothy J. McCoy, Sara S. Russell, Pierre Haenecour, Anjani Polit, Jessica J. Barnes, Thomas J. Zega, Hisayoshi Yurimoto, Noriyuki Kawasaki, Kevin Righter, Guy Libourel, Marc Portail, Vincent Guigoz, Ashley J. King, Lindsay P. Keller, Kathy Thomas‐Keprta, Loan Le, Valarie Tu, Scott A. Eckley, Catherine M. Corrigan, Timothy Gooding, Timothy Rose, Rob Wardell, Soumya Ray, Victoria E. Hamilton, Nicole G. Lunning, Christopher J. Snead, Francis M. McCubbin, Michelle S. Thompson, Rhian H. Jones, Kenneth Domanik, Dolores Hill, Lucas Smith, Iunn J. Ong, Tobias Salge, Natasha Almeida, Catherine Harrison, Helena Bates, Paul Schofield, Ian A. Franchi, Brian H. May, Claudia Manzoni, Andrew J. Ryan, Ronald‐Louis Ballouz, Robert J. Macke, Jason P. Dworkin, Charles C. Lorentson, Kimberly Tait, Erica R. Jawin, Hannah H. Kaplan, Daniella N. DellaGuistina, Kevin J. Walsh, Michael C. Moreau, Heather L. Enos, C. W. V. Wolner, Heather L. Roper, Shogo Tachibana   +57 more
wiley   +1 more source

Curlometer and gradient techniques: past and future applications

Frontiers in Astronomy and Space Sciences
We review the range of applications and use of multi spacecraft techniques, applicable to close formation arrays of spacecraft, focusing on spatial gradient based methods, and the curlometer in particular. The curlometer was originally applied to Cluster
M. W. Dunlop, M. W. Dunlop, H.-S. Fu, C. Shen, X. Tan, X.-C. Dong, Y.-Y. Yang, P. Robert, C. P. Escoubet   +8 more
doaj   +1 more source

Technical Measures, Environmental Protection, and Trade

Review of International Economics, EarlyView.
ABSTRACT Technical regulations are increasingly numerous, complex, and often less transparent than traditional price‐based measures. Widely employed to achieve nontrade policy objectives, these measures are frequently adopted for environmental protection purposes. However, the trade effects of environmental measures remain underexplored. Using a unique
Fabio Gaetano Santeramo, Emilia Lamonaca, Charlotte Emlinger   +2 more
wiley   +1 more source

MISAT: Designing a Series of Powerful Small Satellites Based upon Micro Systems Technology [PDF]

, 2007
MISAT is a research and development cluster which will create a small satellite platform based on Micro Systems Technology (MST) aiming at innovative space as well as terrestrial applications.
Gill, E.,, Monna, G.L.E.,, Scherpen, J.M.A.,, Verhoeven, C.J.M.,   +3 more
core   +2 more sources

Monitoring young associations and open clusters with Kepler in two-wheel mode [PDF]

arXiv, 2013
We outline a proposal to use the Kepler spacecraft in two-wheel mode to monitor a handful of young associations and open clusters, for a few weeks each. Judging from the experience of similar projects using ground-based telescopes and the CoRoT spacecraft, this program would transform our understanding of early stellar evolution through the study of ...
arxiv  

The Limited Place in Cognitive Space

Topics in Cognitive Science, EarlyView.
Abstract How we judge the similarity between stimuli in the world is connected ultimately to how we represent them. Because of this, decisions about how we model similarity, either in terms of human behavior or patterns of neural activity, can provide key insights into how representations are structured and organized.
Carl J. Hodgetts, Ulrike Hahn
wiley   +1 more source

The Need for Better Monitoring of Climate Change in the Middle and Upper Atmosphere

AGU Advances, Volume 6, Issue 2, April 2025.
Abstract Anthropogenic greenhouse gas emissions significantly impact the middle and upper atmosphere. They cause cooling and thermal shrinking and affect the atmospheric structure. Atmospheric contraction results in changes in key atmospheric features, such as the stratopause height or the peak ionospheric electron density, and also results in reduced ...
Juan A. Añel, Ingrid Cnossen, Juan Carlos Antuña‐Marrero, Gufran Beig, Matthew K. Brown, Eelco Doornbos, Scott Osprey, Shaylah Maria Mutschler, Celia Pérez Souto, Petr Šácha, Viktoria Sofieva, Laura de la Torre, Shun‐Rong Zhang, Martin G. Mlynczak   +13 more
wiley   +1 more source

A reconstruction method of electron density distribution in the equatorial region of magnetosphere [PDF]

Advances in Astronomy and Space Physics 5, 104-108 (2015), 2017
A method for the estimation of electron density from the ratio of the wave magnetic and electric field amplitude of whistler waves is developed. Near the geomagnetic equator, whistler wave normals are mainly close to the direction of the background magnetic field. Dispersion relation of whistler wave in the parallel propagation approximation is used in
arxiv  

High‐Speed Electron Flows in the Earth Magnetotail

AGU Advances, Volume 6, Issue 2, April 2025.
Abstract High‐speed electron flows (HSEFs) play a crucial role in the energy dissipation and conversion processes within the terrestrial magnetosphere and can drive various types of plasma waves and instabilities, affecting the electron‐scale dynamics.
Huijie Liu, Wenya Li, Binbin Tang, Cecilia Norgren, Kaijun Liu, Yuri V. Khotyaintsev, Daniel Graham, Tongkuai Li, Chongle Zhang, Andris Vaivads, Shan Wang, Jiansen He, Xiaocheng Guo, James L. Burch, Per‐Arne Lindqvist, Robert Ergun, Daniel Gershman, Benoit Lavraud, Christopher Russell, Quanming Lu, Chi Wang   +20 more
wiley   +1 more source

Nursing 4 Cluster Spacecraft with aging Batteries through Eclipses

, 2008
The Cluster mission was launched in 2000 to investigate for 3 years the interaction between the solar wind and the Earth magnetosphere. The mission has been extended until end 2009.
J. Volpp, James Godfrey, S. Foley, David Fornarelli, Colette Pullig, V. It, Pierre Servan, Telespazio Deutschland, P. Appel, S. Sangiorgi   +9 more
semanticscholar   +1 more source